<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <div class="div"></div>
  <div class="div"></div>
</head>
<body>
  
</body>
<style>
  .div{
    width: 200px;
    height: 80px;
    /* border: 2px  solid red;			 */
    background-color:  #D3857C;
    border-radius: 7px;  /*圆角弧度为7px*/
    position: relative;
    margin: 50px auto;
  }
  .div::before{
			content: '';
      transform: rotate(90deg);
			width: 0;
			height: 0;
			border: 12px solid;
			position: absolute;
			bottom: 30px;
			left: -24px;
 
			border-color:#D3857C transparent transparent;
  }
  .div::after{
			content: '';
      /* transform: rotate(90deg); */
			width: 0;
			height: 0;
			border: 20px solid;
			position: absolute;
			bottom: 30px;
			left: -40px;
      /* background-color:  #D3857C; */
			border-color:  #fff transparent transparent;
  }
</style>
</html>